Originally Posted By: sammy
Dave one thing, it is a long story but I have absolute proof for me that synthetics protect your engine better because they do not break down like conventional. Since it was proven to me in family vehicles with nobody who had a horse in the race either way, nobody will ever convince me full synthetics don't protect as good.
First I was a witness that a car that had a darkening oil issue was solved by changing to Mobil one, and then in my own Truck that used oil and was darkening quick, I changed to M1 and it was solved. So with all due respect, I am totally sold on synthetics, especially for people who get busy and might not want to change their oil every 3k.
I will give you this, if you change your oil every 3k it hardly matter what you though in there, especially in No Cal where it is warm all year round. My own opinion is that by using a high quality syn oil not only will you extend that oil change but it will still protect better all the way up to 10k p0lus. This is from personal experience almost 20 years. Now, I'm no fool when it comes time to extend my OCI's I will send some sample in to make sure I'm not excessively wearing on my motor. Again thanks everyone for contributing.
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When was this 1985? Because I have proof from the last 20 years it no longer matters unless you have an application where a synthetic would perform better, in a internal combustion engine over 90% of the time it does not matter, the factors were a synthetic would preform better is if you have turbo that is operating under constant boost, super charger, sub zero operating temperatures, and extended OCI'S. If you have a slugger and this is not the case synthetic base stocks tend to have a better resistance to sludge. But today to meet various auto manufactures requirements, GF-5, and API certs "conventional" oil has a percentage of synthetic base stocks and "synthetic" oil has a percentage of conventional base stock. The line has been blurred and is no longer black and white. Also the formulation has always been more important than one base stock.
But if you really "need" synthetic to fell better contact an Amsoil or Red Line rep ASAP, these are the two companies in North American the only ones I trust that produce a PCMO with a mostly group IV/V base stock.